/*---------------------------------------------------------------------------*\
  =========                 |
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    \\  /    A nd           | Copyright (C) 2025 OpenFOAM Foundation
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

InNamespace
    Foam::Lagrangianc

Description
    Functions for calculating the time derivative for a Lagrangian equation

SourceFiles
    LagrangiancDdt.C

\*---------------------------------------------------------------------------*/

#ifndef LagrangiancDdt_H
#define LagrangiancDdt_H

#include "LagrangianFieldsFwd.H"
#include "LagrangianSubFieldsFwd.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{

/*---------------------------------------------------------------------------*\
                    Namespace Lagrangianc functions Declaration
\*---------------------------------------------------------------------------*/

namespace Lagrangianc
{
    //- Return the instantaneous time-derivative
    template<class Type>
    tmp<LagrangianSubField<Type>> Ddt
    (
        const LagrangianSubSubField<Type>& psi
    );

    //- Return the instantaneous time-derivative
    template<class Type>
    tmp<LagrangianSubField<Type>> Ddt
    (
        const LagrangianSubScalarSubField& m,
        const LagrangianSubSubField<Type>& psi
    );

    //- Return the Euler explicit/forward time derivative multiplied by the
    //  time-step
    template<class Type>
    tmp<LagrangianSubField<Type>> deltaTddt0
    (
        const LagrangianSubSubField<Type>& psi
    );

    //- Return the Euler explicit/forward time derivative multiplied by the
    //  time-step
    template<class Type>
    tmp<LagrangianSubField<Type>> deltaTddt0
    (
        const LagrangianSubScalarSubField& m,
        const LagrangianSubSubField<Type>& psi
    );
}

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#ifdef NoRepository
    #include "LagrangiancDdt.C"
#endif

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //
